职责链模式

职责链模式是一种对象的行为模式。在责任链模式里，很多对象由每一个对象对其下家的引用而连接起来形成一条链。请求在这个链上传递，直到链上的某一个对象决定处理此请求。发出这个请求的客户端并不知道链上的哪一个对象最终处理这个请求，这使得系统可以在不影响客户端的情况下动态地重新组织和分配责任。

代码1:处理对象

   //申请
    class Request
    {
        //申请类别
        private string requestType;
        public string RequestType
        {
            get { return requestType; }
            set { requestType = value; }
        }

        //申请内容
        private string requestContent;
        public string RequestContent
        {
            get { return requestContent; }
            set { requestContent = value; }
        }

        //数量
        private int number;
        public int Number
        {
            get { return number; }
            set { number = value; }
        }
    }

代码2：处理者

  //管理者
    abstract class Manager
    {
        protected string name;
        //管理者的上级
        protected Manager superior;

        public Manager(string name)
        {
            this.name = name;
        }

        //设置管理者的上级
        public void SetSuperior(Manager superior)
        {
            this.superior = superior;
        }

        //申请请求
        abstract public void RequestApplications(Request request);
    }

    //经理
    class CommonManager : Manager
    {
        public CommonManager(string name)
            : base(name)
        { }
        public override void RequestApplications(Request request)
        {

            if (request.RequestType == "请假" && request.Number <= 2)
            {
                Console.WriteLine("{0}:{1} 数量{2} 被批准", name, request.RequestContent, request.Number);
            }
            else
            {
                if (superior != null)
                    superior.RequestApplications(request);
            }

        }
    }

    //总监
    class Majordomo : Manager
    {
        public Majordomo(string name)
            : base(name)
        { }
        public override void RequestApplications(Request request)
        {

            if (request.RequestType == "请假" && request.Number <= 5)
            {
                Console.WriteLine("{0}:{1} 数量{2} 被批准", name, request.RequestContent, request.Number);
            }
            else
            {
                if (superior != null)
                    superior.RequestApplications(request);
            }

        }
    }

    //总经理
    class GeneralManager : Manager
    {
        public GeneralManager(string name)
            : base(name)
        { }
        public override void RequestApplications(Request request)
        {

            if (request.RequestType == "请假")
            {
                Console.WriteLine("{0}:{1} 数量{2} 被批准", name, request.RequestContent, request.Number);
            }
            else if (request.RequestType == "加薪" && request.Number <= 500)
            {
                Console.WriteLine("{0}:{1} 数量{2} 被批准", name, request.RequestContent, request.Number);
            }
            else if (request.RequestType == "加薪" && request.Number > 500)
            {
                Console.WriteLine("{0}:{1} 数量{2} 再说吧", name, request.RequestContent, request.Number);
            }
        }
    }

代码3：客户端代码，设置职责链

   class Program
    {
        static void Main(string[] args)
        {

            CommonManager jinli = new CommonManager("金利");
            Majordomo zongjian = new Majordomo("宗剑");
            GeneralManager zhongjingli = new GeneralManager("钟精励");
            jinli.SetSuperior(zongjian);
            zongjian.SetSuperior(zhongjingli);

            Request request = new Request();
            request.RequestType = "请假";
            request.RequestContent = "小菜请假";
            request.Number = 1;
            jinli.RequestApplications(request);

            Request request2 = new Request();
            request2.RequestType = "请假";
            request2.RequestContent = "小菜请假";
            request2.Number = 4;
            jinli.RequestApplications(request2);

            Request request3 = new Request();
            request3.RequestType = "加薪";
            request3.RequestContent = "小菜请求加薪";
            request3.Number = 500;
            jinli.RequestApplications(request3);

            Request request4 = new Request();
            request4.RequestType = "加薪";
            request4.RequestContent = "小菜请求加薪";
            request4.Number = 1000;
            jinli.RequestApplications(request4);

            Console.Read();

        }
    }

责任链或者拦截器模式 详细：http://www.360doc.com/content/13/0815/17/1542811_307381688.shtml 

结合携程的mobilerequestfilter等requestfilter